1. A boy whirls a stone in a horizontal circle 1.6m above the ground, by means of a string 1.4 m long. The angle between the string and horizontal plane is 10o. The string breaks and the stone flies of horizontally. It strikes the ground at the point that is 6 maway horizontally.
What was the centripetal acceleration of the stone while in circular motion?
2. A diver springs upward from a board that is threemeters above water. At an instant he contacts the water his speedis 9.20 m/s and his body makes an angle of 78.0o with respect to the horizontal surface of the water.
(a) Determine his initial velocity (magnitude anddirection).
(b) What is his maximum height above the watersurface?
(c) Find the horizontal distance between hisinitial and final points.